20kg boy is running at 4.0m/s on level ground

20kg boy is running at 4.0m/s on level ground when he jumps onto a 5.0 kg sled that is initially at rest on a level, frictionless surface of ice. What is the subsequent speed of the sled while the boy is riding it?
momo1998
Asked Oct 24, 2017

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edpilgrim
Answered Mar 01, 2019

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